fn main() {
    r = 1..2;
    r =  ..2;
    r = 1.. ;
    r =  .. ;
    r = {1}..{2};
    r = 1...10;
    r = 1 ... 10;
    r = ... 10;
    r = 1..=10;
    r = 1 ..= 10;
    r = ..= 10;
    r = 1..=;
    r = 1...;

    for i in 0.. {
        2
    }
}
